Other Net Investment Result - Summary Of Interest Revenue On Financial Instruments Calculated Using The Effective Interest Method (Detail) - EUR (€) € in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Disclosure Of Interest Revenue On Financial Instruments Calculated Using The Effective Interest Method [Line Items] | |||
| Interest revenue on financial instruments calculated using the effective interest method | € 636 | € 605 | € 599 |
| Debt securities and money market instruments [member] | |||
| Disclosure Of Interest Revenue On Financial Instruments Calculated Using The Effective Interest Method [Line Items] | |||
| Interest revenue on financial instruments calculated using the effective interest method | 557 | 484 | 457 |
| Other [member] | |||
| Disclosure Of Interest Revenue On Financial Instruments Calculated Using The Effective Interest Method [Line Items] | |||
| Interest revenue on financial instruments calculated using the effective interest method | € 80 | € 121 | € 142 |